/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.sentry.spring;

import com.jakewharton.nopen.annotation.Open;

import io.sentry.EventProcessor;
import io.sentry.SentryEvent;
import io.sentry.spring.tracing.TransactionNameProvider;
import io.sentry.util.Objects;

import javax.servlet.http.HttpServletRequest;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * Attaches transaction name from the HTTP request to {@link SentryEvent}.
 */
@Open
public class SentryRequestHttpServletRequestProcessor implements EventProcessor {
    private final @NotNull HttpServletRequest request;
    private final @NotNull TransactionNameProvider transactionNameProvider =
        new TransactionNameProvider();

    public SentryRequestHttpServletRequestProcessor(final @NotNull HttpServletRequest request) {
        this.request = Objects.requireNonNull(request, "request is required");
    }

    @Override
    public @NotNull SentryEvent process(
        final @NotNull SentryEvent event, final @Nullable Object hint) {
        if (event.getTransaction() == null) {
            event.setTransaction(transactionNameProvider.provideTransactionName(request));
        }
        return event;
    }
}
